2" Diagonal
Mirror
|
|
|
Precision 1/10 lambda surface with
thickness 10mm mirror.
2"- 1.25" adapter with
copper clamping ring.
High Reflectivity.
Inside diameter (48mm) includes the
capability to connect variety of filters.
Weight : 470 g
|
2"
Diagonal Mirror for Schmidt-Cassegrain
/ Maksutov-Cassegrain
|
Average Customer Rating ( Total 10
): |
|
10 |
|
USER'S FEEDBACK |
I
received the diagonal yesterday evening. I haven't
had a chance to use it yet, but all I can say is
WOW! It's the best looking diagonal I have ever
seen. I'll post a review later on its performance.
Thanks for a beautiful product. It will make the
rest of my scope look ugly.
John
|
Dear
Williams Optics Et. Al - Just a note from the 'Big Sky'
land of Montana to let you know how pleased I am with the
quality and performance of your 2" Mirror Diagonal
on my C14. OUTSTANDING!!! It is everything I was hoping
for and more. You have set a new standard
in excellence. Thanks.
Regards and Clear Skies - J.T. Childs
I
just wanted to tell you I received my
SCT-DIG2" today, and I was very impressed with
the everything about this diagonal. The packaging you put
it in, the workmanship and the performance and physical
stability are outstanding. Thankyou very much for a great
product!
Tom
Hering
|
Thanks. I received the diagonal and focuser yesterday
afternoon. Tried them out last night. I was so impressed
with the SCT diagonal, that I have ordered the non-SCT
diagonal you sell so I can use it with the new crayford
focuser (originally planned on using the Crayford with my
old 1.25" diagonal because of size constraints). The
views through the 2" SCT diagonal on my old Meade
10" SCT are so bright it was like having a brand new
telescope. First rate accessories, Great job!!!
Kevin Bell
A New William-Optics Fan
|
The
2"-format "New Generation" star diagonal
arrived yesterday. It's a masterpiece! It is
beautifully machined, and it's obvious that the designer
took great pains to eliminate glancing reflections
and stray light. Thanks for such a fine product for such
a low price.
Kind
regards,
Tom Dobbin
|
I
got to use my new 2" diagonal on 01/15/03. Even with
all the neighborhood lights and the moon the views were
great. It is a huge improvement over the standard
diagonal on my meade lxd55 ar-5. Images were much sharper
with less false color and less image shift. I can use
higher power before the image degrades. I also got to use
it on 01/17/03 to test my new baader film solar filter.
The views of the sun were also great. This is the best
$99.00 upgrade anyone can buy for their telescope. I
belong to several yahoo telescope groups and I gave you
(William Optics) a plug on my post to the solar group
about the viewing improvements with the diagonal.
Thank-you for making an excellent product.
Carmen
|
Reviewer:
Marc Murison Rating:10.0
A Superb Diagonal at a Great Price!
I recently got a William Optics 2" diagonal from
Anacortes ($100). I've been looking for a while now for a
decent diagonal. Over time I've separately bought a
TeleVue (1.25", $75) and a Lumicon LumiBright
(1.25", $150). Both were badly misaligned, though
not as badly as the one that came with my Synta
refractor. Well, good news: the William Optics diagonal
is superb! In addition to the 1/10-wave mirror (which I
am not in a position to verify, but unlike the other
brands WO puts 1/10-wave in their advertising), the
construction is solid, attractive, and allows easy access
to the mirror. Inside, the mirror lies flat against the
metal housing (full contact over the entire mirror back,
not just at the rim), and it's held in place by rubber
tubing on the shorter-length edges and foam rubber on the
longer edges. Nice design. What's more, there is no glue
or adhesive; the mirror is kept firmly in place without
the need for such crude tactics. This makes this diagonal
eminently suitable for easy shimming to adjust its
alignment. I'm happy to report that I doubt the need
would normally arise. I made measurements with my laser
collimator by drawing spots on the wall across the house.
The WO 2" I received is only 5.4 arcminutes out of
alignment. This is excellent for this price range.
Contrast that with the LumiBright *after* 2 hours of
shimming and adjustment: 15 arcmin. (It was originally
three times worse.) My Synta diagonal was 1.2 degrees
off. I also have an INTES 1.25" Herschel wedge, and
for grins I measured its alignment: 7.2 arcmin -- also
excellent, in line with INTES's reputation. Finally, the
WO came with a 1.25" adapter which has the same
high-quality machining as the diagonal housing. Both the
diagonal and the adapter(!) are threaded for filters.
Also, both diagonal and adapter use compression rings to
hold your eyepieces. Thus, in summary, the William Optics
2" diagonal is superbly constructed, very well
aligned, and an absolute steal at $100.
|
Reviewer:
vito mazzariello Rating: 10.0
A "Star" is Born Move over "brand
name" products, a new star is born. The Williams
Optics 2" star diagonal is the new standard in the
business. A solid piece of aluminum complete with brass
compression fitting, large thumb screws and a barlow
ledge to prevent eyepieces from hitting the mirror. Other
standard features include threaded 48mm filter fitting,
2"to 1.25"compression fitting adapter and
reflectivity rate of 97%. It also has a neat feature
should you wish to access the inside to clear or replace
mirror. Both "aluminum" sides that flank
the diagonal can be removed to reveal the interior. So
how does this diagonal compare to the big boys of past?
Lets just say after several nights of comparing the
"top three" the Williams Optics equaled or
exceeded in resolve and Reflectivity. If this
doesn't spin your spur, the two tone black/polished
aluminum "modern" look will. With it also being
the lowest cost in the high-end diagonal arena by more
than half the price, the Williams Optics is clearly the
winner. Sorry other "brand-names" move
over a star is born!
|
Great Star Diagonal at a Great Price
Just received by William Optics 2" 90 degree Star
Diagonal. The alignment of the mirror was excellent on my
new TEC 140 mm oil spaced apochromat refractor. It
performed well with my Televue eyepieces. This item comes
with not only the 2" compression ring but a 1
1/4" adapter with a compression ring, too. Finally,
it is threaded for 2" filters. I counted off one
rate level as the compression rings tend to grab the
eyepieces when pulling them out of the diagonal. Almost
appears it would need a slight filing with a fine file to
smooth or polish the brass compression ring. It is not a
major detractor to its performance. When you consider
that it would cost three times more to get only a
slightly greater quality in a Televue, Takahashi, or
Astro-Physics, it is a very good bargain.
|
|